out of the blue my friends L300 decided to kick on the SES light. He had Jiffy lube read the OBD-II because he had to get his oil changed anyway, and they said it came up as Oxygen sensor Bank 1 Sensor 1. We're assuming this is the sensor located in front of the front 3 cylinders. Are we correct? And autozone is charging $122 for this sensor, is there somewhere else that is cheaper?

Thx!

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